ACIDIC AND CATALYTIC PROPERTIES OF CSXH3-XPW12O40 HETEROPOLYACID COMPOUNDS

被引：138

作者：

ESSAYEM, N ^{[1
]}

COUDURIER, G ^{[1
]}

FOURNIER, M ^{[1
]}

VEDRINE, JC ^{[1
]}

机构：

[1] UNIV SCI & TECH LILLE FLANDRES ARTOIS,CATALYSE HETEROGENE & HOMOGENE LAB,F-59655 VILLENEUVE DASCQ,FRANCE

来源：

CATALYSIS LETTERS | 1995年 / 34卷 / 1-2期

关键词：

CESIUM SALTS OF POLYOXOTUNGSTATE; HETEROPOLYACID; MICROPOROSITY; ACIDITY; N-BUTANE ISOMERIZATION; METHANOL DEHYDRATION;

D O I：

10.1007/BF00808337

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The heteropolyacid of Keggin structure (H3PW12O40) and several of its cesium salts have been synthesized and characterized for their acidic properties. Chemical analysis, TGA, NH3 adsorption-desorption and P-31 MAS-NMR techniques permit the characterization of the Bronsted acidity. The catalytic properties were studied for n-butane isomerization and for methanol conversion to dimethyl ether at 200 and 180 degrees C, respectively. Our conclusion is that, in term of conversion, the more acidic catalysts are in the range Cs-2/(2.7) if considering a wide range of acid strengths evidenced by methanol conversion. The range is Cs-2/Cs-2.1 if one considers only very strong acidity as evidenced by n-butane isomerization.

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页码：223 / 235

页数：13

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